Thermally conductive liquid pack

ABSTRACT

Provided is a thermally conductive liquid pack including a liquid thermal conductive material and a hollow pliable outer package filled with the liquid thermal conductive material, the pliable outer package having a first contact surface and a second contact surface different from the first contact surface and being in a closed state, the pliable outer package including a first sheet including the first contact surface, a second sheet including the second contact surface and disposed opposite to the first sheet, the first sheet and the second sheet including a plurality of fine discharge holes capable of discharging the thermal conductive material, a release sheet configured to seal the discharged holes from the outside being releasably layered on the first sheet and the second sheet, and the second sheet including a third sheet formed from a non-woven fabric or mesh in the inside thereof.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Japanese Patent Application No.2017-127158 filed Jun. 29, 2017 in the Japan Patent Office, and theentire disclosure of Japanese Patent Application No. 2017-127158 isincorporated herein by reference.

BACKGROUND

The present invention relates to a thermally conductive liquid pack.

In the related art, a thermally conductive sheet is often used as athermally conductive member provided so as to fill a gap betweenelectronic components disposed on a substrate and a heat dissipationmember disposed on a side opposite to the substrate among the electroniccomponents. The thermally conductive sheet has advantages such as easyhandling property. In a case of a thermally conductive sheet havingelasticity, the thermally conductive sheet can be brought into closecontact with the electronic components and the heat dissipation member.

However, it is difficult that the thermally conductive sheet is broughtinto close contact with a plurality of electronic components havingdifferent heights from the substrate together. Therefore, the size andthickness of the thermally conductive sheet need to be changed dependingon portions (electronic components) where the thermally conductive sheetis used.

Accordingly, putty or grease may be used as the thermally conductivemember. In this case, the amount of putty or grease to be used can beadjusted and the putty or grease is allowed to come into close contactwith a complex structure to which the thermally conductive sheet is notapplicable and to fill a gap.

CITATION LIST Patent Literature

Patent Literature 1: JP 2016-062953 A

Patent Literature 2: JP 2016-143634 A

SUMMARY

However, when the viscosity of putty or grease is decreased so as to beapplied to the complex structure, the putty or grease may flow down fromuse portions. As the temperature increases, the viscosity of putty orgrease generally decreases. Therefore, when putty or grease havingrelatively high viscosity is tried to be applied in consideration ofdecrease in viscosity, the putty or grease cannot be applied to a finestructure and the adhesion may be decreased.

When the amount of putty or grease to be used is smaller or larger thana proper amount, troubles such as insufficient adhesion and entrapmentof air occur. Therefore, control of the use amount is required andimprovement of workability is desired.

In the circumstances, the present invention has been completed. Anobject of the present invention is to provide a thermally conductiveliquid pack as a thermally conductive member that is applicable to acomplex structure and has excellent heat transfer and workability.

The present invention provides a thermally conductive liquid packincluding a liquid thermally conductive material and a hollow pliableouter package filled with the liquid thermally conductive material. Thehollow pliable outer package includes a first contact surface and asecond contact surface different from the first contact surface and isin a closed state.

According to the present invention, the thermally conductive liquid packcan be freely deformed due to the pliable outer package that is flexibleand the liquid thermally conductive material placed in the pliable outerpackage. Therefore, even when a heating body and a heat dissipation bodyhave a complex shape, the first contact surface and the second contactsurface can be easily deformed along the complex shape and come intoclose contact with the heating body and the heat dissipation body bypressing the thermally conductive liquid pack against the heating bodyand the heat dissipation body.

Further, even when the temperature of a setting environment and theheating body increases, the thermally conductive liquid pack does notflow down, unlike grease and putty. Therefore, the thermally conductiveliquid pack can be in close contact with an adherend and keep favorableheat transfer. Since the thermally conductive liquid pack has a packshape, control of use amount is not necessary, the thermally conductiveliquid pack is only arranged at a setting portion, and the thermallyconductive liquid pack has excellent workability, unlike putty andgrease.

A liquid includes a substance having such a viscosity that the shape ishardly held by itself like honey, and represents a so-called viscousbody.

The thermally conductive liquid pack may include a configurationdescribed below.

The pliable outer package includes a first sheet including the firstcontact surface and a second sheet including the second contact surfaceand disposed opposite to the first sheet, at least one of the firstsheet and the second sheet includes a plurality of fine discharge holescapable of discharging the thermally conductive material, and a releasesheet configured to seal the discharged holes from the outside isreleasably layered on the at least one of the first sheet and the secondsheet.

With the configuration, during using the thermally conductive liquidpack, the release sheet is peeled and the first contact surface of thefirst sheet and/or the second contact surface of the second sheet ispressed against an adherend. The thermally conductive material isgradually discharged through the discharge holes and spreads between thefirst contact surface and/or the second contact surface and theadherend. Thus, the thermally conductive liquid pack (the pliable outerpackage and the thermally conductive material) reliably comes into closecontact with the adherend. Further, the thermally conductive liquid packis unlikely to slip from the adherend due to the viscosity and surfacetension of the spread thermally conductive material. When the thermallyconductive material has adhesiveness, the thermally conductive liquidpack is fixed on the adherend.

Further, the pliable outer package includes a first sheet including thefirst contact surface and a second sheet including the second contactsurface and disposed opposite to the first sheet, at least one of thefirst sheet and the second sheet is formed from a non-woven fabric ormesh, and a release sheet configured to suppress discharge of thethermally conductive material from the outside is releasably layered onthe non-woven fabric or mesh.

With the configuration, during use of the thermally conductive liquidpack, the release sheet is peeled and the first contact surface of thefirst sheet and/or the second contact surface of the second sheet ispressed against an adherend. The thermally conductive material graduallyoozes through the non-woven fabric or mesh and spreads between the firstcontact surface and/or the second contact surface and the adherend.Thus, the thermally conductive liquid pack (the pliable outer packageand the thermally conductive material) reliably comes into close contactwith the adherend. Further, the thermally conductive liquid pack isunlikely to slip from the adherend due to the viscosity and surfacetension of the spread thermally conductive material. When the thermallyconductive material has adhesiveness, the thermally conductive liquidpack is fixed on the adherend.

Furthermore, the pliable outer package includes a first sheet includingthe first contact surface and a second sheet including the secondcontact surface and disposed opposite to the first sheet, the firstsheet and the second sheet include a plurality of fine discharge holescapable of discharging the thermally conductive material, a releasesheet configured to seal the plurality of discharged holes from theoutside is releasably layered on the first sheet and the second sheet,and a third sheet formed from a non-woven fabric or mesh is layered onan internal surface of the second sheet.

With the configuration, the timing of discharge, discharge rate, anddischarge amount of the thermally conductive material on a side of thefirst sheet, the timing of discharge, discharge rate, and dischargeamount of the thermally conductive material on a side of the secondsheet can be controlled so as to be different from each other.Specifically, on the first sheet side, the thermally conductive materialleaks directly from the inside of the pliable outer package, and on thesecond sheet side, the thermally conductive material oozes from theinside of the pliable outer package to the third sheet (the non-wovenfabric or mesh) and then oozes out through the discharge holes of thesecond sheet. Therefore, the first sheet may be pressed against theadherend by pressing from the second sheet side, to come into closecontact with the adherend. Then, the adherend may be pressed against thesecond sheet to come into close contact with the second sheet. At thattime, the thermally conductive material does not leak to the secondsheet side under pressing from the second sheet side. Therefore, a handand a tool for pressing are not made dirty.

When the hole diameter of the discharge holes in the first sheet is setto be larger than the hole diameter of the discharge holes in the secondsheet, the discharge rate and discharge amount of the thermallyconductive material on the first sheet side and the discharge rate anddischarge amount of the thermally conductive material on the secondsheet side are more easily controlled so as to be different from eachother.

When the thermally conductive liquid pack is configured to discharge thethermally conductive material, it is preferable that the thermallyconductive material have such a viscosity that the thermally conductivematerial does not easily drip, unlike water.

The thermally conductive material may have adhesiveness. With such aconfiguration, the thermally conductive material leaked from the pliableouter package causes the thermally conductive liquid pack to adhere tothe adherend.

According to the present invention, a thermally conductive liquid packthat is applicable to a complex structure (shape) and has excellent heattransfer and workability is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanyingdrawings, wherein like numbers reference like elements.

FIG. 1 is a cross-sectional view of a thermally conductive liquid packin the first embodiment.

FIG. 2 is an exploded perspective view of the thermally conductiveliquid pack.

FIG. 3 is a cross-sectional view illustrating a use state of thethermally conductive liquid pack.

FIG. 4 is a cross-sectional view of a thermally conductive liquid packin the second embodiment.

FIG. 5 is an exploded perspective view of a thermally conductive liquidpack in the third embodiment.

FIG. 6 is a cross-sectional view of the thermally conductive liquidpack.

DESCRIPTION OF EMBODIMENTS First Embodiment

The first embodiment will be described with reference to FIGS. 1 to 3.In a thermally conductive liquid pack 10 of this embodiment, a hollowouter package (an example of a pliable outer package) in which edges ofa pair of rectangular sheets (a first sheet 11 and a second sheet 12),are closed by thermal welding is filled with a liquid thermallyconductive material 13.

The first sheet 11 and the second sheet 12 are formed from a pliableresin that is flexible, such as an HS-PET film with a side of 15 mm(heat resistance temperature: 125° C. or higher). The thickness of thefirst sheet 11 and the second sheet 12 is set within a range from 27 to52 μm (in this embodiment, 32 μm). In the first sheet 11 of the pair ofsheets, a plurality of circular discharge holes 14 with a diameter of1.5 mm are uniformly provided at an interval of 4.0 mm over the entiresurface.

On an external surface 11A of the first sheet 11, a release sheet 16that is releasable is layered. The plurality of discharge holes 14 aresealed with the release sheet 16.

For example, the thermally conductive material 13 is a substance inwhich a thermally conductive filler and an additive are mixed in anacrylic resin. The thermally conductive material 13 is a liquid havingsuch a low viscosity that the shape is hardly held by itself like honey.The thermally conductive material 13 has such a viscosity that thethermally conductive material does not easily drip, unlike water.Further, the thermally conductive material 13 has adhesiveness. Thethermally conductive material 13 can be filled between the first sheet11 and the second sheet 12 by mixing raw materials and sucking up theraw materials by using a vertical pillow packaging device (liquid andpaste packaging machine MR-8 manufactured by SANKO MACHINERY CO., LTD).

In FIG. 2, the thermally conductive material 13 is illustrated as asolid for convenience. Before use, the thermally conductive material 13hardly enters the inside of fine discharge holes 14 and has such aviscosity that the thermally conductive material is held between thefirst sheet 11 and the second sheet 12 (see FIG. 1).

During using the thermally conductive liquid pack 10 of the embodiment,the release sheet 16 is peeled to expose the external surface 11A (anexample of a first contact surface) of the first sheet 11. The exposedexternal surface 11A is faced to an adherend C and then pressed againstthe adherend C from the second sheet 12 side.

As a result, the thermally conductive material 13 filled in thethermally conductive liquid pack 10 enters the discharge holes 14, leaksto the outside, and then spreads between the external surface 11A (thefirst contact surface) and the adherend C, as illustrated in FIG. 3.Thus, the thermally conductive liquid pack 10 is brought into closecontact with the adherend C in a state where slipping hardly occurs dueto the viscosity and surface tension of the spread thermally conductivematerial 13. Subsequently, the thermally conductive liquid pack 10 isdried to be adhered to the adherend C. As the thermally conductivematerial 13, a thermally conductive material having adhesiveness withoutdrying may be used.

The thermally conductive liquid pack 10 in this embodiment can be freelydeformed due to the first sheet 11 and the second sheet 12 that areflexible and pliable and the liquid thermally conductive material 13filled in the thermally conductive liquid pack 10. Therefore, even whenthe adherend C has a complex shape, the thermally conductive liquid pack10 can be easily deformed along the complex shape and come into closecontact with the adherend C by pressing the thermally conductive liquidpack 10 against the adherend C. Even when a gap between the thermallyconductive liquid pack 10 and the adherend C is large, the liquidthermally conductive material does not flow down during use of theliquid thermally conductive material.

Further, the first sheet 11 has the plurality of fine discharge holes14, and the thermally conductive material 13 filled in the inside leaksto the external surface 11A of the first sheet 11. Therefore, thethermally conductive material 13 can be brought into contact with afiner portion. In addition, slipping of the thermally conductive liquidpack 10 from the adherend can be suppressed due to the viscosity andsurface tension of the thermally conductive material 13 until thethermally conductive material is adhered by drying.

Even when the temperature of a setting environment and the adherend Cincreases, the thermally conductive liquid pack 10 does not flow down,unlike grease and putty. Therefore, the thermally conductive liquid pack10 can be in close contact with the adherend C and keep favorable heattransfer. Since the thermally conductive liquid pack 10 has a packshape, the thermally conductive liquid pack is only arranged at asetting portion in an assembly line without a liquid quantitativedispenser, and the thermally conductive liquid pack has excellentworkability.

Second Embodiment

The second embodiment will be described with reference to FIG. 4.Hereinafter, only a configuration different from that of the firstembodiment will be described. For the same component as that in thefirst embodiment, a number in which 10 is added to the number of eachcomponent in the first embodiment is used.

In a thermally conductive liquid pack 20 of this embodiment, a secondsheet 22 is formed from a polyester non-woven fabric instead of anHS-PET film, differently from the first embodiment. In this embodiment,the non-woven fabric with a fabric weight of 50 g/m2 is used.

Edges of a first sheet 21 and the second sheet 22 are closed by heatwelding and the inside thereof is filled with a thermally conductivematerial 23. On an external surface 22A of the second sheet 22, arelease sheet 27 that is releasable is layered. Before use, thethermally conductive material 23 almost has such a viscosity that thethermally conductive material 23 is held between the first sheet 21 andthe second sheet 22 (the non-woven fabric) although the thermallyconductive material 23 partially oozes to the second sheet 22 (thenon-woven fabric).

During use of the thermally conductive liquid pack 20 of the embodiment,the release sheet 27 is peeled to expose the external surface 22A (anexample of a second contact surface) of the second sheet 22. Theexternal surface 22A is faced to an adherend and then pressed againstthe adherend from the first sheet 21 side.

As a result, the thermally conductive material 23 filled in thethermally conductive liquid pack 20 oozes to the second sheet 22 (thenon-woven fabric), gradually oozes out to the external surface 22A, andthen gradually spreads between the external surface 22A (the secondcontact surface) and the adherend. Thus, the thermally conductive liquidpack 20 is brought into close contact with the adherend in a state whereslipping hardly occurs due to the viscosity and surface tension of thespread thermally conductive material 23. Subsequently, the thermallyconductive liquid pack 20 is dried to be adhered to the adherend.

The thermally conductive liquid pack 20 of this embodiment is alsoapplicable to a complex structure and has excellent heat transfer andworkability, like the first embodiment.

Third Embodiment

Next, the third embodiment will be described with reference to FIGS. 5and 6. Hereinafter, only a configuration different from that of thefirst embodiment will be described. For the same component as that inthe first embodiment, a number in which 20 is added to the number ofeach component in the first embodiment is used.

In a thermally conductive liquid pack 30 of this embodiment, a hollowouter package (an example of a pliable outer package) in which edges ofa pair of rectangular sheets (a first sheet 31 and a second sheet 32),are closed by thermal welding is filled with a liquid thermallyconductive material 33. The thermally conductive material 33 hasadhesiveness.

In the first sheet 31, a plurality of first circular discharge holes 34with a diameter of 1.5 mm are uniformly provided at an interval of 5.0mm over the entire surface. In the second sheet 32, a plurality ofsecond circular discharge holes 35 with a diameter of 1.0 mm areuniformly provided at an interval of 5.0 mm over the entire surface.That is, the hole diameter of the first discharge holes 34 is largerthan the hole diameter of the second discharge holes 35.

On an external surface 31A (a first contact surface) of the first sheet31, a first release sheet 36 that is releasable is layered. On anexternal surface 32A (a second contact surface) of the second sheet 32,a first release sheet 37 that is releasable is layered similarly. Theplurality of discharge holes 34 and 35 are sealed with the releasesheets 36 and 37.

On an internal surface (a surface on a side opposite to the secondcontact surface) of the second sheet 32, a third sheet 38 formed from amesh is layered through an adhesive not illustrated in the drawing. Thethermally conductive material 33 is filled between the first sheet 31and the third sheet 38. Before use, the thermally conductive material 33almost has such a viscosity that the thermally conductive material 33 isheld between the first sheet 31 and the third sheet 38 although thethermally conductive material 33 partially oozes to the third sheet 38(the mesh). In FIG. 6, the thermally conductive material 33 isillustrated as a solid for convenience.

During use of the thermally conductive liquid pack 30 of the embodiment,the first release sheet 36 is peeled to expose the external surface 31A(an example of the first contact surface) of the first sheet 31, and thesecond release sheet 37 is peeled to expose the external surface 32A (anexample of the second contact surface) of the second sheet 32. Theexternal surface 31A is faced to an adherend and then pressed againstthe adherend from the second sheet 32 side.

As a result, the thermally conductive material 33 filled in thethermally conductive liquid pack 30 leaks through the discharge holes 34of the first sheet 31 and gradually spreads between the external surface31A and the adherend. At that time, the thermally conductive material 33oozes to the third sheet 38 (mesh) on a pressing side (the secondcontact surface side). The thermally conductive material 33 does notleak to the outside (the external surface 32A).

Subsequently, another adherend is disposed on the second sheet 32 sideand then pressed against the first sheet 31. After a while, thethermally conductive material 33 oozed to the third sheet 38 (the mesh)reaches the second discharge holes 35, leaks through the seconddischarge holes 35, and gradually spreads between the external surface32A (the second contact surface) and the adherend.

According to this embodiment, the timing of discharge of the thermallyconductive material 33 on the first sheet 31 side (the external surface31A) and the timing of discharge of the thermally conductive material 33on the second sheet 32 side (the external surface 32A) can be controlledso as to be different from each other.

That is, on the first sheet 31 side, the thermally conductive material33 leaks directly through the first discharge holes 34, and on thesecond sheet 32 side, the thermally conductive material 33 oozes outfrom the third sheet 38 (the mesh) and then leaks through the seconddischarge holes 35 of the second sheet 32.

Therefore, when the external surface 31A of the first sheet 31 ispressed against the adherend by pressing from the second sheet 32 sideand comes into close contact with the adherend, the thermally conductivematerial 33 does not leak to the second sheet side 32. Accordingly, ahand and a tool for pressing is not made dirty. After then, the externalsurface 32A of the second sheet 32 may be pressed against the adherendto bring the thermally conductive material 33 leaked later into closecontact with the second sheet 32.

When the thermally conductive material 33 oozes out to the third sheet38 (the mesh) and then leaks through the second discharge holes 35,discharge of the thermally conductive material 33 through the firstdischarge holes 34 gradually proceeds. That is, the discharge amount ofthe thermally conductive material 33 through the first discharge holes34 is larger than the discharge amount of the thermally conductivematerial 33 through the second discharge holes 35. Therefore, when thefirst sheet 31 is disposed on a side having an uneven surface thatrequires a larger amount of the thermally conductive material 33, suchas a substrate side, and the second sheet 32 is disposed on a sidehaving a flat surface such as a heat dissipation plate, the first sheet31 and the second sheet 32 can be each brought into close contact with aproper amount of the thermally conductive material 33.

The thermally conductive material 33 leaks directly through the firstdischarge holes 34, but the thermally conductive material 33 only leaksin an amount of the thermally conductive material 33 that oozes out fromthe third sheet 38 through the second discharge holes 35. Therefore, thedischarge rate of the thermally conductive material 33 through the firstdischarge holes 34 is different from the discharge rate of the thermallyconductive material 33 through the second discharge holes 35.

Since the hole diameter of the first discharge holes 34 is set to belarger than hole diameter of the second discharge holes 35, thedischarge rate of the thermally conductive material 33 on the firstsheet 31 side is different from the discharge rate of the thermallyconductive material 33 on the second sheet 32 side. Therefore, thedischarge amount of the thermally conductive material 33 from the firstdischarge holes 34 is larger than the discharge amount of the thermallyconductive material 33 from the second discharge holes 35.

According to this embodiment, the thermally conductive liquid pack 30that is applicable to a complex structure and has excellent heattransfer and workability is obtained.

Other Embodiments

The present invention is not limited by the preceding recitations and/orthe embodiments described using the drawings, and various aspects suchas the following should be construed to be included in the scope of thetechnology disclosed in the present invention.

The aforementioned embodiments represent that a thermally conductiveliquid is discharged between a thermally conductive liquid pack and anadherend by providing discharge holes in the thermally conductive liquidpack or providing a non-woven fabric or mesh in the thermally conductiveliquid pack. However, the thermally conductive liquid may notnecessarily be discharged to the outside. Further, the thermallyconductive liquid pack may be configured to come into close contact withthe adherend with closing. In this case, it is preferable that thepliable outer package be filled with the thermally conductive materialwithout a space.

In the embodiments, the outer package is formed by welding or adheringedges of the pair of rectangular sheets (the first sheet and the secondsheet). However, the outer package may have a configuration in which asheet is folded into two to form first and second sheets and overlappededges of the first and second sheets are welded or adhered.

A thermally conductive liquid pack in a complete form is not limited tothe aforementioned embodiments and may be appropriately modifiedaccording to the form of an adherend and a setting position. Forexample, the thermally conductive liquid pack may have a polyhedral formin which a plurality of sheets are jointed or a gored form applicable toa largely uneven form (with large thickness).

The first and second embodiments represent the thermally conductiveliquid pack in which the thermally conductive material leaks only to onesurface. However, the thermally conductive liquid pack may have aconfiguration in which the thermally conductive material leaks to bothsurfaces. Alternatively, the thermally conductive liquid pack may have aconfiguration in which discharge holes are provided on one surface sideand a non-woven fabric or mesh is provided on another surface side.

In the third embodiment, a thermally conductive liquid pack in which thehole diameters of discharge holes on both sides are the same as eachother and the discharge amounts on the both sides are made differentfrom each other only by effects of the mesh or non-woven fabric can beformed.

The hole diameter and shape of the discharge holes and the opening ofthe non-woven fabric or mesh are not limited to the aforementionedembodiments, and may be appropriately modified. The positions where thedischarge holes are set are not limited to the entire surface of thesheet, and may be provided on a part of the surface.

In the aforementioned embodiments, the thermally conductive material maybe configured to have such a viscosity that the thermally conductivematerial does not enter the discharge holes or ooze out to the non-wovenfabric or mesh before using the thermally conductive liquid pack.However, a liquid thermally conductive material having low viscositysuch as water may be used. In this case, the thermally conductivematerial may be configured to enter the discharge holes or a part or thewhole of the non-woven fabric or mesh before using the thermallyconductive liquid pack.

The thermal conductive material may not necessarily have adhesiveness.

The second embodiment represents the configuration of the pliable outerpackage in which the edge of the second sheet 22 (the non-woven fabric)and the first sheet 21 are closed by thermal welding. However, thepliable outer package in a closed state may be formed by thermallywelding the edge of the release sheet 27 in which the second sheet 22 islayered in the inside thereof with the first sheet 21.

What is claimed is:
 1. A thermally conductive liquid pack comprising: athermally conductive material in a liquid state; and a hollow pliableouter package, the hollow pliable outer package being filled with theliquid thermal conductive material, wherein the hollow pliable outerpackage includes a first contact surface and a second contact surfacedifferent from the first contact surface and is in a closed state. 2.The thermally conductive liquid pack according to claim 1, wherein thehollow pliable outer package includes a first sheet including the firstcontact surface, a second sheet including the second contact surface anddisposed opposite to the first sheet, and a release sheet, at least oneof the first sheet and the second sheet includes a plurality of finedischarge holes capable of discharging the thermal conductive material,and the release sheet is configured to seal the plurality of finedischarged holes from the outside and is releasably layered on the atleast one of the first sheet and the second sheet.
 3. The thermallyconductive liquid pack according to claim 1, wherein the hollow flexibleouter package includes a first sheet including the first contactsurface, a second sheet including the second contact surface anddisposed opposite to the first sheet, and a release sheet, at least oneof the first sheet and the second sheet is formed from a non-wovenfabric or a mesh, and the release sheet is configured to suppressleakage of the thermal conductive material from the outside and isreleasably layered on the non-woven fabric or mesh.
 4. The thermallyconductive liquid pack according to claim 1, wherein the hollow pliableouter package includes a first sheet including the first contactsurface, a second sheet including the second contact surface anddisposed opposite to the first sheet, and a release sheet, the firstsheet and the second sheet include a plurality of fine discharge holescapable of discharging the thermal conductive material, the releasesheet is configured to seal the plurality of fine discharged holes fromthe outside and is releasably layered on the first sheet and the secondsheet, and the second sheet includes a third sheet formed from anon-woven fabric or a mesh in the inside thereof.
 5. The thermallyconductive liquid pack according to claim 4, wherein the plurality ofdischarge holes in the first sheet have a hole diameter larger than ahole diameter of the plurality of discharge holes in the second sheet.6. The thermally conductive liquid pack according to claim 2, whereinthe thermal conductive material has adhesiveness.
 7. The thermallyconductive liquid pack according to claim 3, wherein the thermalconductive material has adhesiveness.
 8. The thermally conductive liquidpack according to claim 4, wherein the thermal conductive material hasadhesiveness.
 9. The thermally conductive liquid pack according to claim5, wherein the thermal conductive material has adhesiveness.
 10. Thethermally conductive liquid pack according to claim 2, wherein thehollow pliable outer package includes a first sheet including the firstcontact surface, a second sheet including the second contact surface anddisposed opposite to the first sheet, and a release sheet, at least oneof the first sheet and the second sheet is formed from a non-wovenfabric or a mesh, and the release sheet is configured to suppressleakage of the thermal conductive material from the outside and isreleasably layered on the non-woven fabric or mesh.
 11. The thermallyconductive liquid pack according to claim 10, wherein the thermalconductive material has adhesiveness.